I needed a way to easily mount 2 GoPro cameras to video snow blowing action by the Kubota tractor (before the snow melted). I wanted one camera on the tractor and the other on the car parked in the snowed-in driveway.
Luckily I saved the packaging materials that came with the GoPro cameras - and the packaging happens to include a square plastic base with an integral GoPro base mount - perhaps something that's meant to be thrown away.
I ended up securing two neodymium magnets to the plastic base so that I can quickly mount and unmount the cameras to any magnetic surface.
It took just a short time to make the magnetic bases and they now are an important part of my GoPro camera gear.
The included video shows the snow blowing action that I captured with the help of my GoPro magnetic camera mounts.
Epoxy will likely hold the magnetics to the plastic base securely enough but I happened to have some steel "magnet cups" on hand that attach with flat head screws. For this project I used wood screws but flat head machine screws and nuts would be a better alternative.